thodg/libgit2/src/util/map.h

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• Hash : c3b7ace9
  Author :
  Date : 2021-11-14T16:43:53
  

  refactor: make util an object library Instead of simply including the utility files directly, make them a cmake object library for easy reusability between other projects within libgit2. Now the top-level `src` is responsible for platform selection, while the next-level `libgit2` and `util` configurations are responsible for identifying what objects they include.

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• src/util/map.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef INCLUDE_map_h__
  #define INCLUDE_map_h__
  
  #include "git2_util.h"
  
  
  /* p_mmap() prot values */
  #define GIT_PROT_NONE 0x0
  #define GIT_PROT_READ 0x1
  #define GIT_PROT_WRITE 0x2
  #define GIT_PROT_EXEC 0x4
  
  /* git__mmmap() flags values */
  #define GIT_MAP_FILE	0
  #define GIT_MAP_SHARED 1
  #define GIT_MAP_PRIVATE 2
  #define GIT_MAP_TYPE	0xf
  #define GIT_MAP_FIXED	0x10
  
  #ifdef __amigaos4__
  #define MAP_FAILED 0
  #endif
  
  typedef struct { /* memory mapped buffer	*/
  	void *data; /* data bytes			*/
  	size_t len; /* data length			*/
  #ifdef GIT_WIN32
  	HANDLE fmh; /* file mapping handle */
  #endif
  } git_map;
  
  #define GIT_MMAP_VALIDATE(out, len, prot, flags) do { \
  	GIT_ASSERT(out != NULL && len > 0); \
  	GIT_ASSERT((prot & GIT_PROT_WRITE) || (prot & GIT_PROT_READ)); \
  	GIT_ASSERT((flags & GIT_MAP_FIXED) == 0); } while (0)
  
  extern int p_mmap(git_map *out, size_t len, int prot, int flags, int fd, off64_t offset);
  extern int p_munmap(git_map *map);
  
  #endif
  

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